Why atheists call creationists ignorant.

If you are a creationist, ask your self how many times you've asked an atheist a question many others have already answered to it. That's really all there is to it :| A simple question like "Could god (Who can do anything) create a rock he can't lift?" Completely disproves the possibility for the existence of god but instead of accepting the nonexistence of god, a creationist says "Ok, but-" And moves on to the next question that someone already answered to him 20 times.. We call you ignorant because you keep fighting over a fight you already lost and because of the fact that you can't seem to understand that answering "I don't know" isn't the same as admitting to be wrong..